1 /* 2 * MUSB OTG driver debugfs support 3 * 4 * Copyright 2010 Nokia Corporation 5 * Contact: Felipe Balbi <felipe.balbi@nokia.com> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 19 * 02110-1301 USA 20 * 21 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 24 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 28 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34 #include <linux/module.h> 35 #include <linux/kernel.h> 36 #include <linux/sched.h> 37 #include <linux/init.h> 38 #include <linux/list.h> 39 #include <linux/kobject.h> 40 #include <linux/platform_device.h> 41 #include <linux/io.h> 42 #include <linux/debugfs.h> 43 #include <linux/seq_file.h> 44 45 #ifdef CONFIG_ARM 46 #include <mach/hardware.h> 47 #include <mach/memory.h> 48 #include <asm/mach-types.h> 49 #endif 50 51 #include <asm/uaccess.h> 52 53 #include "musb_core.h" 54 #include "musb_debug.h" 55 56 #ifdef CONFIG_ARCH_DAVINCI 57 #include "davinci.h" 58 #endif 59 60 struct musb_register_map { 61 char *name; 62 unsigned offset; 63 unsigned size; 64 }; 65 66 static const struct musb_register_map musb_regmap[] = { 67 { "FAddr", 0x00, 8 }, 68 { "Power", 0x01, 8 }, 69 { "Frame", 0x0c, 16 }, 70 { "Index", 0x0e, 8 }, 71 { "Testmode", 0x0f, 8 }, 72 { "TxMaxPp", 0x10, 16 }, 73 { "TxCSRp", 0x12, 16 }, 74 { "RxMaxPp", 0x14, 16 }, 75 { "RxCSR", 0x16, 16 }, 76 { "RxCount", 0x18, 16 }, 77 { "ConfigData", 0x1f, 8 }, 78 { "DevCtl", 0x60, 8 }, 79 { "MISC", 0x61, 8 }, 80 { "TxFIFOsz", 0x62, 8 }, 81 { "RxFIFOsz", 0x63, 8 }, 82 { "TxFIFOadd", 0x64, 16 }, 83 { "RxFIFOadd", 0x66, 16 }, 84 { "VControl", 0x68, 32 }, 85 { "HWVers", 0x6C, 16 }, 86 { "EPInfo", 0x78, 8 }, 87 { "RAMInfo", 0x79, 8 }, 88 { "LinkInfo", 0x7A, 8 }, 89 { "VPLen", 0x7B, 8 }, 90 { "HS_EOF1", 0x7C, 8 }, 91 { "FS_EOF1", 0x7D, 8 }, 92 { "LS_EOF1", 0x7E, 8 }, 93 { "SOFT_RST", 0x7F, 8 }, 94 { "DMA_CNTLch0", 0x204, 16 }, 95 { "DMA_ADDRch0", 0x208, 32 }, 96 { "DMA_COUNTch0", 0x20C, 32 }, 97 { "DMA_CNTLch1", 0x214, 16 }, 98 { "DMA_ADDRch1", 0x218, 32 }, 99 { "DMA_COUNTch1", 0x21C, 32 }, 100 { "DMA_CNTLch2", 0x224, 16 }, 101 { "DMA_ADDRch2", 0x228, 32 }, 102 { "DMA_COUNTch2", 0x22C, 32 }, 103 { "DMA_CNTLch3", 0x234, 16 }, 104 { "DMA_ADDRch3", 0x238, 32 }, 105 { "DMA_COUNTch3", 0x23C, 32 }, 106 { "DMA_CNTLch4", 0x244, 16 }, 107 { "DMA_ADDRch4", 0x248, 32 }, 108 { "DMA_COUNTch4", 0x24C, 32 }, 109 { "DMA_CNTLch5", 0x254, 16 }, 110 { "DMA_ADDRch5", 0x258, 32 }, 111 { "DMA_COUNTch5", 0x25C, 32 }, 112 { "DMA_CNTLch6", 0x264, 16 }, 113 { "DMA_ADDRch6", 0x268, 32 }, 114 { "DMA_COUNTch6", 0x26C, 32 }, 115 { "DMA_CNTLch7", 0x274, 16 }, 116 { "DMA_ADDRch7", 0x278, 32 }, 117 { "DMA_COUNTch7", 0x27C, 32 }, 118 { } /* Terminating Entry */ 119 }; 120 121 static struct dentry *musb_debugfs_root; 122 123 static int musb_regdump_show(struct seq_file *s, void *unused) 124 { 125 struct musb *musb = s->private; 126 unsigned i; 127 128 seq_printf(s, "MUSB (M)HDRC Register Dump\n"); 129 130 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { 131 switch (musb_regmap[i].size) { 132 case 8: 133 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, 134 musb_readb(musb->mregs, musb_regmap[i].offset)); 135 break; 136 case 16: 137 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, 138 musb_readw(musb->mregs, musb_regmap[i].offset)); 139 break; 140 case 32: 141 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, 142 musb_readl(musb->mregs, musb_regmap[i].offset)); 143 break; 144 } 145 } 146 147 return 0; 148 } 149 150 static int musb_regdump_open(struct inode *inode, struct file *file) 151 { 152 return single_open(file, musb_regdump_show, inode->i_private); 153 } 154 155 static int musb_test_mode_show(struct seq_file *s, void *unused) 156 { 157 struct musb *musb = s->private; 158 unsigned test; 159 160 test = musb_readb(musb->mregs, MUSB_TESTMODE); 161 162 if (test & MUSB_TEST_FORCE_HOST) 163 seq_printf(s, "force host\n"); 164 165 if (test & MUSB_TEST_FIFO_ACCESS) 166 seq_printf(s, "fifo access\n"); 167 168 if (test & MUSB_TEST_FORCE_FS) 169 seq_printf(s, "force full-speed\n"); 170 171 if (test & MUSB_TEST_FORCE_HS) 172 seq_printf(s, "force high-speed\n"); 173 174 if (test & MUSB_TEST_PACKET) 175 seq_printf(s, "test packet\n"); 176 177 if (test & MUSB_TEST_K) 178 seq_printf(s, "test K\n"); 179 180 if (test & MUSB_TEST_J) 181 seq_printf(s, "test J\n"); 182 183 if (test & MUSB_TEST_SE0_NAK) 184 seq_printf(s, "test SE0 NAK\n"); 185 186 return 0; 187 } 188 189 static const struct file_operations musb_regdump_fops = { 190 .open = musb_regdump_open, 191 .read = seq_read, 192 .llseek = seq_lseek, 193 .release = single_release, 194 }; 195 196 static int musb_test_mode_open(struct inode *inode, struct file *file) 197 { 198 file->private_data = inode->i_private; 199 200 return single_open(file, musb_test_mode_show, inode->i_private); 201 } 202 203 static ssize_t musb_test_mode_write(struct file *file, 204 const char __user *ubuf, size_t count, loff_t *ppos) 205 { 206 struct musb *musb = file->private_data; 207 u8 test = 0; 208 char buf[18]; 209 210 memset(buf, 0x00, sizeof(buf)); 211 212 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 213 return -EFAULT; 214 215 if (!strncmp(buf, "force host", 9)) 216 test = MUSB_TEST_FORCE_HOST; 217 218 if (!strncmp(buf, "fifo access", 11)) 219 test = MUSB_TEST_FIFO_ACCESS; 220 221 if (!strncmp(buf, "force full-speed", 15)) 222 test = MUSB_TEST_FORCE_FS; 223 224 if (!strncmp(buf, "force high-speed", 15)) 225 test = MUSB_TEST_FORCE_HS; 226 227 if (!strncmp(buf, "test packet", 10)) { 228 test = MUSB_TEST_PACKET; 229 musb_load_testpacket(musb); 230 } 231 232 if (!strncmp(buf, "test K", 6)) 233 test = MUSB_TEST_K; 234 235 if (!strncmp(buf, "test J", 6)) 236 test = MUSB_TEST_J; 237 238 if (!strncmp(buf, "test SE0 NAK", 12)) 239 test = MUSB_TEST_SE0_NAK; 240 241 musb_writeb(musb->mregs, MUSB_TESTMODE, test); 242 243 return count; 244 } 245 246 static const struct file_operations musb_test_mode_fops = { 247 .open = musb_test_mode_open, 248 .write = musb_test_mode_write, 249 .read = seq_read, 250 .llseek = seq_lseek, 251 .release = single_release, 252 }; 253 254 int __init musb_init_debugfs(struct musb *musb) 255 { 256 struct dentry *root; 257 struct dentry *file; 258 int ret; 259 260 root = debugfs_create_dir("musb", NULL); 261 if (IS_ERR(root)) { 262 ret = PTR_ERR(root); 263 goto err0; 264 } 265 266 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 267 &musb_regdump_fops); 268 if (IS_ERR(file)) { 269 ret = PTR_ERR(file); 270 goto err1; 271 } 272 273 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 274 root, musb, &musb_test_mode_fops); 275 if (IS_ERR(file)) { 276 ret = PTR_ERR(file); 277 goto err1; 278 } 279 280 musb_debugfs_root = root; 281 282 return 0; 283 284 err1: 285 debugfs_remove_recursive(root); 286 287 err0: 288 return ret; 289 } 290 291 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 292 { 293 debugfs_remove_recursive(musb_debugfs_root); 294 } 295